perf_sample_ustack_size

Name:perf_sample_ustack_size

Proto:static u16 perf_sample_ustack_size(u16 stack_size, u16 header_size, struct pt_regs *regs)

Type:u16

Parameter:

Type	Parameter	Name
u16	stack_size
u16	header_size
struct pt_regs *	regs

6198

If Not regs Then Return 0

6211

task_size = min - return minimum of two values of the same or compatible types*@x: first value*@y: second value((u64)USHRT_MAX, Get remaining task size from user stack pointer.* It'd be better to take stack vma map and limit this more* precisely, but there's no way to get it safely under interrupt,* so using TASK_SIZE as limit.)

6212

stack_size = min - return minimum of two values of the same or compatible types*@x: first value*@y: second value(stack_size, (u16)task_size)

6215

header_size += 2 * sizeof(u64)

6218

If header_size + stack_size < header_size Then

6223

stack_size = USHRT_MAX - header_size - sizeof(u64)

6224

stack_size = und_up - round up to next specified power of 2*@x: the value to round*@y: multiple to round up to (must be a power of 2)* Rounds @x up to next multiple of @y (which must be a power of 2).* To perform arbitrary rounding up, use roundup() below.(stack_size, sizeof(u64))

6227

Return stack_size

**Caller**
Name	Describe
perf_prepare_sample

Source code conversion tool public plug-in interface	X
Support c/c++/esqlc/java Oracle/Informix/Mysql Plug-in can realize: logical Report Code generation and batch code conversion